A 200-mg dose of a drug is injected intravenously into a human subject. The drug rapidly distributes into an apparently homogeneous fluid volume. Ten hours after injection, the plasma concentration of drug is 3.28 mg/mL. At 16.92 hours after injection, the plasma concentration of drug is 1.64 mg/mL. Calculate: (i) the biological half-life, (ii) elimination rate constant, (iii) volume of distribution, and (iv) plasma clearance.

The deserts of the sahara and australia are associated with

In what for do plants utilize nitrogen? why do they need nitrogen?

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.